crlner



Oct. 6', 1931. H. J. CRINER VALVE GRINDING MACHINE Filed Nov. 11, 1929 2 Sheets-Sheet INVENTOR.

Oct. 6, 1931. H J R|NER 1,826,653

VALVE GRINDING MACHINE Filed Nov. 11, 1929 2 Sheets-Sheet 2 7 a/M7%\ INVENTOR.

m4 ATTORNEY 2.2 'F 'gure 3 is apartial vplan'view I Y partsgin. section and showing an alternate Patented ocee, 1931 -smrm AT OFFER 1 memmmjaa. or sivmmm owa, AssIGnoRor ONE-HALFWTO A Busmor DAVENPORT,- Iown a VALV en rnnme; MAonINE Application filed November 11,1929. Serial no: 406,27.

-1'7 My applicationrelates to improvements in valve grinding machines. 7 The objects of my invention are; 1T0 gprov'ide iaisimple, "easily operated 7 5 grinder for grindingvalves for internal combustionengmes :andfother slmllar valves;

' .aTo provideavalve grinder which can be inan'ufa'cturedat'glow cost and'will be simple and 'easytooperate; a 1 0 @JTo reduce the numberof parts required for a To provide simplified means for revolving a l jp be ground in a} fixed position-and for causing the contacting part of the grinding wheel .to travel across the-face of thesur- I I. face to be ground in a substantially horizonfltal path, the. valve stem in the meantime re- I volving in ahorizontal plane.;. I 3 attain these objects by, the means illus- 50 trated in the accompanying drawings, in

Which v i Figure 1 is a planv-iew of my machine,;but showing the varlous'partsn sectlon; V

Figure 2 is an end elevation}. r

showing 'form of connecting the. grinding shaft'and theohuck shaftg 4 I 1 f. Figure l is a detail end view of atool hold- I an erforholdinga diamond. dressing tool,

Figure 5. is a planviewof same.

eSimilar numerals refer to similar-parts v throughout the several views. My machine comprises a fiat base, 1, preferably five-cornered,'although it maybe of any desired-shape,- and with the housing, 2, bearing, 3, bearing support, 4, and-bosses, 6 and 6.,preferablycast or otherwise formed 1 integral therewith.

" 5 D In the bosses (Sand 6, mount apivot .sha'ft, 7. The boss; 6', is threaded and the pivot shaft, 7 ,has its rear end threadedas at 27 -.and has .ahan'chwheel 28, rigidly secured thereto by whichitmay be turned. and when turned, the action of the threaded part upon i the threads in the boss, 6, will causelthe pivot shaft to move longitudinally of the" base.

A d v g ubs, d. 86, rmed- "integral.Ltherewith, lis pivotally..,mjounted haBiYQfl heft. Were-. 3. 36

"chuck, 37.

orstem, 35, of the valve to be ground, may

are secured the shaft pins, 251; and 26, or other suitable means, adjacent the hubs, 8b and 8a,- and as 5 the I shaft moves longitudinally, these collars carry the saddle, 8," along with-the shaft. Uponthe saddle, 8, I secure an'electric motor 18 by set screws, 80, or other suitable means. Thismotor is provided with an-extended shaft, 17 upon the front endof which Imount bypress fit.or other suitable means, a threaded sleeve, 20a, having a in a bushing 17a, at therear of the motor and is bored out to receive one end of a cable or fiexibleshaft, 22, which maybe secured thereto y a press-fit, by sweating, by a pin or other suitable means. V .The cable orfiexible shaft, is covered with a-housing, 24:, which is connected to the motor housing; at the rear endthereof by a sleeve, I ith threads, 23a, to secure it to the housl he bearing, .3, extends at. an angle of 45 or-other desiredangl to thepiyot shaft, which is parallel to the motor shaft. A bush.-

. .ing, 42', is mounted'therein and a-chuck shaft,

43, is revolvably mounted within the bushing. The front end of the chuck shaft, 43, is tapered-and forms an arbor to receive the The chuck, 87, may be of any of the ordinary types'in common use. and I make no claim, for any particular type of chuck. The chuck, 37, has-jaws, 37a,;in which the'shank be inserted. V g v p v Upon the rear end of the chuck shaft, 48, I mount a relatively large gear Wheel, 30, which is preferably secured. in place by threading the. end, .29, of the chuck shaft, 95 43', and placing a nut, 29a, thereon. ,The gear 433mg desiredimanner. I I I, Integral with the base, .1, andhousifng', .2,

wheel, -30, maybe secured to the chuck shaft,

le tmana e in h h w shaft 52.

V 'y'vheel atacon'si'deribly mo're r apid-rate:

:ba se,t0' "the reer end of the chuck-"support V anditsrearend is enlarged into a head, 31a,

whichi ish-ollow and in which one end -ot'the V i cable or flexible shaft is rigidly secured; The

7 corresponding. end of,the cable housing,l2,

r r i s securedjto the hou'sing, 2, by .a threaded sleeve, 34c. The interlnediateportion of the" fiexiblecablejis supported by an, arIn 38,-hav.-

m a vertical -portion, :39, extending through the u per portion of thezb'ase and bentjat i right angle'to f orm an extension,40, Which bears against the under side of thetopg pqrj tion. 0f the base holdsthe farm, 38, "in

substanti ly'horizonta' lito'sitio The outer d of the'a rrn,'38=; is formed into a hook, 41, to aid in "holding the cable housingf2 se- Y order to yalyes to the; best adyanite}: it is necessary tfo revolve the valves and iitha e' portion'of th'eairalye, infoontact with 'thelgrinding wheel, should-revolv' e in a direction oppositefto' the I contacted portion of the grin ding wheel. f In the arr angeinent shown in Figure F1, as the; grinding? Wheel" revolves to the right, the-Valve b'eingfdriyen' through the gemsgj snen -31,'and the fiex'ible shaft, 22, will-alsofrevolve to the 'right. 7' "It is also, advisable to revolve/the grinding the t rvebe ng grease; a

valv

m 3 h vee h a rnefii e end "of th e motor shaft.- l'fiwith aflan'ge col- '1ar,"4 8,jtof'locl 'the grinding wheel securely between? the flange collar' "and a fixed flange upon the connecting piece, 47. Qneend of the; cable or flexible shaft, ib, is rigidly securedfl to the connecting (piece, 47, and-the cable i on flexible sh fatt, Q46, is then carried j'aroundthrough suitableopenings, 49, in the and-united to the rear end ot the chuck shaft, 7-43. by a bress-fit-for other suitebleimeans. H

The {cablefhousing', be suitably unitedito the connectingpiece; 47,, the

@rin by? a t wded eer. 4M jIpre-fe'r t usethe cupped-' rm ace meshed in iiigeri bjilthj threaded sleeve, 4A1. and to "theqehuck shaft a '0 2 i i f "ingfwheels as that willfgive the most accurate v I si' lt s,';bnt" any' suitabl'eiorm.of grinding V I Whee l? maybe uti'lized; f' {prefer "to have the grineingwheei are'mmieny swung jupoli the Y" r elatiye t theyalve heed, e mete -isthn' ei Wheel alittle' greater than the Width of the Valve face to be ground,fbut it is obvious that these proportions may be varied to suitithe requirements of any particular case Qethe desires of "any individual "operator; With'a' grinding face from A of an inch in wig'ith,but'a'very slight movement of the 7 motor and grinding wheelr is necessaryto feed thewheel entirely across the "groundfac'e f of'thetalve W t While the motor saddle: may be, pivoted thickness of the grinding face of the'cupped' V at-any point, I prefertoso construct myma- H chine that the motor shaft WillQn or-inally'lie then 138- draWn; across the" beveled faee: of the v'al've in a slight 'arc--which is ahnost horizontal, the point of contact: b'eing'slightly aboye the horizontal axis of the chuek middle of the trayeliof the grinde andj beiing' slightly below the level ofthe :a'xis of Inhi'gures I and fi' I'haVe=s1iown the grind} venajtthe middle of, its tra've When're- 5' Thedrawings s forexeigii'argqe Valves, if desired the chuck shaftat botherds ofit'st rayeh V V leasedfiroinzthe pressure' ot'th'e hanmthe. nnotoii saddlewili descend until its rests upon the adjacent portion ofthe'basejl a how mylinachine somewhat run: valves and extrasiz 'es may be made. V

v The threaded portion 27, jof the shaft, T, A

protiides' iheansf for adjusting the longitudi- 'nal positionof the motor sufiiciently torheet all'orfdinary reqi1irernents,' but of course, can,

- I I v y be varied as desired to. meet particular cases. is n e e fshq' iin gu al ,I F12- the; 4t:rigidlyamounee m h f In the useo f grinding wheel's, is necessary totruethe grinding facesffroin time to time. For-"this purpose, I have deyis'eid'a dressing tool whichqconlprises a bo'dy', 12, 3 having a shank, 1 5 ,-slidabl y mounted there-s Lin, withits'noint fitted with a diamond." A v shanlg ll, is formed integral wi'ththebody,

-upon e upper. end of the boss. 6; a set screw isfthreaded I .theshank, 1 1,canbe'lockedthereinj q l ai dapted to enter the o enin iiaef1mm H In he Operati my 'fice? the he 1' and: the grinding wheel may be fed up head. This should be repeated several times closer and clos'er'to the valve'until the proper face has been ground thereon, The motor .7 maythen beflstopped and the valve taken out and replaced and the operation repeated. e I When necessary" to dress the grinding rwheel the valveiis removed from the chuck I I and the dressing tool shown in Figure 4 inserted in the extension',9, of the boss, 6, and locked in the desired position by the'set screw 10. The shank, 15, is then moved to the desired posit-ion and locked by. the set screw, 14.

The motoris then started and the grinding 'wheel movedto the desired point longitudi- I nally by the hand-wheel, 28. The motor and The weight grinding Wheel are then swung upon the pivot shaft, 7, and the face of the grinding: wheel-moved slowly past the point of the diamond of the dressing tool. a I

I prefer to use a rather fine thread upon the shaft, 7, so that the grinding wheel may be fed up to the valve and to the dressing tool very slowly.

assistthe operator in moving the grinding wheel steadily and firmly. v It is obvious that the motor and grinding wheelmay be pivoted at a point directly under the motor shaft or, at such otherpoint as may be desired, but I prefer to pivot same 7 substantially as shown so as to avoid the ver-,,

tical travel which would necessarily take place if pivoted at a point,v farther from the valve.

For clearnessof reference in the claims,

except when otherwise indicated, I refer to the shaft, 7 ,asthe pivot shaft; to the shaft,

. The term, flexible shaft is intended to cover a chain, a cable, aplurality of shaft sections united by universal joints or any movement of apair of rigid shafts driven thereby. I e

e other form of shaft-like connection which will transmit rotary motion directly and which may be flexed "so as to permit relative I claim: e r r 1. A valve grinding "machine comprising a base, a motorsaddle pivotally attached to the base, a motor secured upon the saddle, a handle united to the motor housing, a grindbe the "mow and saddle will valve shaft, and means for adjusting the motor longitudinally. e

2.111 a valve grinding machine, a base,

hubs united to the base, a pivot shaft seated in the hubs, with means for turning the pivot shaft united to one end thereof, one of said hubs and the portion of the shaft adjacent thereto beingcorrespondingly threaded, a saddle pivotally mounted upon the pivot shaft, sleeves secured upon the pivot shaft adapted to prevent the relative longitudinal movement of the saddle thereon, a motor mounted upon the saddle and having a motor shaftextending beyond the motor housing at one end thereof, and a grinding wheel rigidly secured upon the extended end of the motor shaft.

3. In a valve grinding machine, a base, hubs united tothe base, a pivot shaft seated in the hubs, with means for turning the pivot shaft united to one end thereof, one of said hubs and the portion of the shaft adjacent thereto being correspondingly threaded, a saddle pivotally mounted upon the pivot shaft, means secured upon the pivot shaft adapted to prevent the relative longitudinal movement'of the saddle thereon, a motor mounted upon the saddle and having a motor shaft extending beyond the motor housing at one end thereof, and a grinding wheel rigidly secured upon the extended end of the motor hubs and the portion of the shaft adjacent thereto being correspondingly threaded, a I

saddle, pivotally mounted upon thepivot shaft, sleeves secured upon the pivot shaft adapted to prevent the relative longitudinal movement of'the saddle thereon, a motor mounted upon the saddle and having a motor shaft extending beyond the motor housing at one end thereof, a grinding wheel rigidly secured upon the extended end of the motor shaft, and asocket in the base in front of the grinding wheel,'and a removable dressing tool seatable in the socket.

In testimony whereof he afiixes his signature. I HARRY J. GRIN'ER.

ing wheel mountedupon one end of the motprshaft, abearingunited to the base, a valve shaft mounted in the bearing at anacute V r angle to the-motor shaft, means secured upon V the valve shaft adapted to receive and hold thestemiof a valve to be ground, a flexible shaft coupled directly to the motor shaft and 

